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Houston, Texas 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Houston TX
National Weather Service Forecast for: Houston TX
Issued by: National Weather Service Houston, TX
Updated: 1:20 pm CDT Aug 12, 2025
 
This
Afternoon
This Afternoon: A 30 percent chance of showers and thunderstorms, mainly before 5pm.  Mostly sunny, with a high near 93. Heat index values as high as 104. East wind around 5 mph.
Chance
T-storms

Tonight

Tonight: A 20 percent chance of showers and thunderstorms before 8pm.  Mostly clear, with a low around 80. Southeast wind around 5 mph becoming calm  in the evening.
Slight Chance
T-storms then
Mostly Clear
Wednesday

Wednesday: A 50 percent chance of showers and thunderstorms, mainly after 2pm.  Mostly sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming southeast around 5 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunny then
Chance
T-storms
Wednesday
Night
Wednesday Night: A 10 percent chance of showers and thunderstorms before 7pm.  Partly cloudy, with a low around 80. South wind around 5 mph.
Slight Chance
T-storms then
Mostly Clear
Thursday

Thursday: A 50 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 94. Calm wind becoming south around 5 mph in the afternoon.
Sunny then
Chance
T-storms
Thursday
Night
Thursday Night: Partly cloudy, with a low around 80.
Partly Cloudy

Friday

Friday: A chance of showers, then showers and thunderstorms likely after 10am.  Mostly sunny, with a high near 93. Chance of precipitation is 60%.
Chance
T-storms then
T-storms
Likely
Friday
Night
Friday Night: Partly cloudy, with a low around 80.
Partly Cloudy

Saturday

Saturday: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 94.
Chance
T-storms

Hi 93 °F Lo 80 °F Hi 94 °F Lo 80 °F Hi 94 °F Lo 80 °F Hi 93 °F Lo 80 °F Hi 94 °F

 

This Afternoon
 
A 30 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 93. Heat index values as high as 104. East wind around 5 mph.
Tonight
 
A 20 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 80. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
 
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming southeast around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 80. South wind around 5 mph.
Thursday
 
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
 
Partly cloudy, with a low around 80.
Friday
 
A chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny, with a high near 93. Chance of precipitation is 60%.
Friday Night
 
Partly cloudy, with a low around 80.
Saturday
 
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Saturday Night
 
Partly cloudy, with a low around 80.
Sunday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Sunday Night
 
Mostly clear, with a low around 80.
Monday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.

 

Forecast from NOAA-NWS for Houston TX.

Weather Forecast Discussion
110
FXUS64 KHGX 121800
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
100 PM CDT Tue Aug 12 2025

...New SYNOPSIS, DISCUSSION, MARINE...

.KEY MESSAGES...
Issued at 1250 PM CDT Tue Aug 12 2025

- Typical summer-like weather is expected this week with isolated to
  scattered showers and storms, with the best chances in the
  afternoon.
- High temperatures mainly in the low to mid 90s throughout the
  week with an increasing temperature trend possible over the
  weekend into early next week.

&&

.DISCUSSION...
Issued at 1250 PM CDT Tue Aug 12 2025

We continued to be situated in a region of weak upper-lvl
troughiness, with high pressure systems to our east and west. This
weak troughiness, combined with decent moisture (PWs into the 1.9
to 2.1 inch range), daytime heating and some weak surface
trough/convergence is leading to the development of scattered
storms. The primary forcing for convection is currently located to
our east, so expect more scattered activity to develop and move
from east to west this afternoon. The Brazos Valley and portions
of the Piney Woods area should also be monitored for isolated to
scattered storms this afternoon, as they may develop in response
to "orphan" outflow boundaries from storms located in north-
central TX. A few of these storms will be slow-moving, capable of
producing locally heavy rainfall. Strong gusty winds are also
possible with the strongest cells. Also, with a weak boundary
along the coast, and weak low-lvl vorticity, weak funnel clouds
will be possible into the late afternoon. Highest chances east of
I-45. Rain and storms should taper off around sunset.


A similar weather pattern is expected for Wednesday into early
this weekend, with potentially slightly more coverage of storms.
This is due to a few shortwaves moving through the pattern aloft.
Additionally, a surface trough over the Louisiana coast will
increase moisture levels across the region. The peak of these
showers and storms will be in early morning across the coastal
waters, and in the afternoon further inland.

Rain and storm chances gradually decrease towards the end of the
weekend as the ridge to our east strengthens and expands westward
into our region. While precipitation chances decrease,
temperatures will be on the rise. Not only that, but ample
moisture will lead to humid conditions, leading to peak afternoon
heat indices in the triple digits. Highs in the mid to upper 90s
can be anticipated towards the end of the forecast period.

JM

&&

.AVIATION...
(12Z TAF Issuance)
Issued at 529 AM CDT Tue Aug 12 2025

Another day of typical summer-time convection is expected today,
however coverage should be lower than the past few days. Activity
will pop up along the coast through the morning, then spread
inland through the afternoon. Generally light winds and VFR
conditions are expected to persist through the period, though
heavy rainfall and gusty winds will be possible within any storms
that develop.

Fowler

&&

.MARINE...
Issued at 1250 PM CDT Tue Aug 12 2025

Light to occasionally moderate offshore winds early this
afternoon, will gradually transition to the south-southeast within
the next few hours. Offshore winds early in the mornings, and
onshore winds in the afternoon and evenings can be expected in the
next several days due to sea and land breezes. Low seas will also
prevail through most of the period. With enough moisture and the
presence of a weak surface trough along the coast, isolated to
scattered showers and storms are expected each day, with the best
chances/coverage Thursday and Friday.

JM

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  96  77  96  76 /  30  20  40  10
Houston (IAH)  95  79  96  79 /  30  20  50  10
Galveston (GLS)  91  83  91  83 /  50  10  30  10

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.
&&

$$

DISCUSSION...JM
AVIATION...Fowler
MARINE...JM
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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